Copper-tungsten/copper-alloy integrated contact and preparation method thereof
A copper alloy and contact technology, which is applied in the field of copper-tungsten/copper alloy integral contacts and their preparation, can solve the problems of reducing the reliability of switch operation, falling off copper-tungsten alloy, failing to meet high-voltage switches well, and reducing production. Steps, the effect of improving the bonding strength and increasing the thermal conductivity
Examples
Embodiment 1
[0020] Firstly, use wet mechanical powder mixing, mix tungsten powder with a particle size of 2 μm and 300 mesh copper powder according to the weight content of tungsten (W) at 50%, spray and dissolve a saturated gasoline solution containing paraffin, and then sieve it to produce 40-mesh A copper tungsten particles; mix tungsten powder with a particle size of 4 μm and 300-mesh copper powder according to the weight content of tungsten (W) at 60%, spray and dissolve gasoline saturated solution containing paraffin, and sieve to make 40-mesh B copper tungsten particles; mix tungsten powder with a particle size of 2 μm and 4 μm (50% by weight) and 300 mesh copper powder according to the weight content of 70% tungsten (W) to make 40 mesh B copper tungsten particles ; The tungsten powder with a particle size of 6 μm and the 300-purpose copper powder are mixed according to the weight content of tungsten (W) as 80%, and the gasoline saturated solution containing paraffin is sprayed and ...
Embodiment 2
[0025] The preparation of the copper-tungsten alloy of the contact part is the same as in Example 1, followed by sintering to connect the chromium bronze (0.5% chromium) alloy conductive rod, and the atmosphere is controlled during the sintering process to improve the bonding strength. The specific method is first in hydrogen and then Sintered under nitrogen.
[0026] The copper tungsten / chrome bronze integral contact obtained in this embodiment is tested for bonding strength, and the test result is 337MPa, which is higher than the standard of 256MPa used by the current high-voltage switch factory, and the integral contact obtained in the present invention is tested for installation type, and the results show that It can meet the requirements of self-supporting integral contacts for switches and circuit breakers with voltage levels above 110-800Kv.
Embodiment 3
[0028] The preparation of the copper-tungsten alloy of the contact part is the same as in Example 1, and then the copper-tungsten alloy part is connected to the chrome-bronze conductive rod by electron beam welding.
[0029] The bonding strength test of the copper tungsten / chrome bronze integral contact obtained in this embodiment is carried out, and the test result is 290MPa, which is higher than the standard of 256MPa adopted by the current high-voltage switch factory, and the integral contact obtained in the present invention is subjected to a machine type test, and the results show that It can meet the requirements of integral contacts for switches and circuit breakers with voltage levels above 110-800Kv.
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Abstract
Description
Claims
Application Information
- IPC
- H01H1/025; H01H1/04; H01H11/04; C22C27/04; C22C1/04; B22F3/16; B22F7/08
- Inventors
- 宋忠孝; 何美荣